Malicious PDF — malware analysis report

Static analysis result for SHA-256 306f16ac8ccb3422…

MALICIOUS

PDF

68.5 KB Created: 2021-04-25 04:40:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a156cda03c64f22743d9a0996887b691 SHA-1: 71b59f49c964372c1d1b33cc000c80c274eedf2a SHA-256: 306f16ac8ccb34225938b92afe11b93defaa311fb614e6c3d34b6263bb5042f9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. An external URI pointing to 'seumenha.ru' was extracted, suggesting a phishing or malware distribution lure. While no scripts were directly extracted, the PDF structure and embedded URI are strong indicators of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/strik?utm_term=make+a+toga+costume
    • https://cdn.sqhk.co/derepinejabi/cgdijh7/jurijofet.pdf
    • https://cdn.sqhk.co/vulovosovem/hgfVshi/74955443373.pdf
    • https://cdn.sqhk.co/goxobuve/wiiibfB/dufumuvategu.pdf
    • https://cdn-cms.f-static.net/uploads/4369322/normal_6061e7b3ae834.pdf
    • http://buzatukati.iblogger.org/37924329597.pdf
    • http://tejovotemikodes.getenjoyment.net/48204520302.pdf
    • http://forovasax.medianewsonline.com/30709023735.pdf
    • http://waralolojogeta.sportsontheweb.net/escritos_de_poltica_benjamin_constant.pdf
    • https://cdn-cms.f-static.net/uploads/4454306/normal_6035bc983d90a.pdf
    • https://static.s123-cdn-static.com/uploads/4464080/normal_5ffd68ef4e336.pdf
    • https://cdn.sqhk.co/situdejoj/zIgjyig/bejuxe.pdf
    • https://cdn-cms.f-static.net/uploads/4376879/normal_6035c970d3b8d.pdf
    • https://cdn.sqhk.co/mogizilo/iaS4jiy/bass_booster_pro_music_eq_apk_free_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jaferojizewawer.epizy.com/lutemoxitafajulurafi.pdf
    • https://uploads.strikinglycdn.com/files/a71a4327-396a-45b6-9a30-cc18204589e0/how_do_i_fix_my_panasonic_microwave_h98.pdf
    • https://uploads.strikinglycdn.com/files/be3fa1c2-0958-42be-9dcc-85da2689ca8c/tokamesopib.pdf
    • https://uploads.strikinglycdn.com/files/7c373d75-4516-49d4-8ad0-386a45265906/tuzopipazoxikurisejep.pdf
    • http://bakutogigu.rf.gd/background_music_app_for_android.pdf
    • http://jataluwapimose.rf.gd/37089816367.pdf
    • https://uploads.strikinglycdn.com/files/6d338636-3f14-4a5e-8dfb-c6c442d1c136/vobipepazorudoxoxiv.pdf
    • https://uploads.strikinglycdn.com/files/9f5b2416-3ada-4801-adc5-ff25303730e3/incomplete_metamorphosis_meaning_in_english.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d11a.bin
6dbc0cb4659e8709b041cd9a5b3a8a06a5b094904c98acceac254c0c35b0a361
pdf-font-stream PDF embedded font (sfnt) at offset 0xD11A 5060 bytes
font_01_sfnt_off0000e259.bin
e064a3003f18d51cea15a8a7c3ddced8c55a932ecb0a8d9f724900eef9775279
pdf-font-stream PDF embedded font (sfnt) at offset 0xE259 10196 bytes